Chapter 16. Problem 16.36

Problem-Solving Video Assessment
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Problem 16.36: Lactic Acid Fermentation

1.

Imagine that 6 moles of glucose are converted into pyruvate via glycolysis. What is the net gain in NADH?

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2.

Imagine that 10 moles of glucose are converted into lactate via glycolysis followed by fermentation. What is the net gain in NADH?

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When ingested, sucrose (table sugar) is digested into equal parts glucose and fructose. In muscle, fructose is phosphorylated by hexokinase into fructose 6-phosphate and then proceeds into glycolysis via phosphofructokinase.

3.

What is the standard free-energy change for the conversion of one mole of sucrose into lactate? Use the data given in Table 16.1 and the fact that ΔG°' = -25 kJ/mol for the fermentation of pyruvate into lactate. Assume that the standard free energy of the hexokinase reaction is the same for all substrates.

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4.

What is the nonstandard free-energy change for the conversion of one mole of sucrose into lactate when the concentrations of reactants are: 7 mM sucrose; 0.1 mM lactate; 4 mM ATP; 0.5 mM ADP; and 3 mM Pi?

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_feedback_correct: Correct. _feedback_incorrect: Incorrect.

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